/*
 * Copyright:  2018 smarabbit studio.
 *
 *  Licensed under the Confluent Community License; you may not use this file
 *  except in compliance with the License.  You may obtain a copy of the License at
 *
 *  http://www.confluent.io/confluent-community-license
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OF ANY KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations under the License.
 *
 *  @作   者： 黄开晖 (117227773@qq.com)
 *  @日   期:  2021年10月27日
 */
package com.massyframework.beanskin.util.classloading;

import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Enumeration;
import java.util.Objects;

import com.massyframework.beanskin.util.CompoundEnumeration;

/**
 * 混合类加载器, 将两个类加载器叠加在一起
 * @author huangkh
 *
 */
public class MixinClassLoader extends URLClassLoader {
	
	private ModuleClassLoader classLoader;

	/**
	 * @param urls
	 */
	public MixinClassLoader(ModuleClassLoader loader, ClassLoader parent) {
		super(new URL[0], parent);
		this.classLoader = Objects.requireNonNull(loader, "\"loader\" cannot be null.");
	}

	@Override
	protected Class<?> findClass(String name) throws ClassNotFoundException {
		return this.classLoader.loadClass(name);
	}

	@Override
	public URL findResource(String name) {
		return this.classLoader.findResource(name);
	}

	@SuppressWarnings("unchecked")
	@Override
	public Enumeration<URL> findResources(String name) throws IOException {
		Enumeration<URL>[] ems = new Enumeration[2];
		ems[0] = super.findResources(name);
		ems[1] = this.classLoader.findResources(name);
		return new CompoundEnumeration<URL>(ems);
	}

	

}
